Composition of matter for moulding purposes.



lO6. COMPOSITIONS,

COATING OR PLASTIC.

V "RUDOLF PLATZ, on LEIPSIC, GERMANY.

boui osmou O'F MATTER FOR MOLDING .FMRP'osEs.

GPECIFIG ATION forming part Of Patent NO. 629,600, dated J'uly 25, 1899. g

' Application filed larch 2,1899. Serial No. 707,521. (No specimens.) i

I vof the various constituents making up the JO ingredients, to which, if desirable, coloringmatter may be added: water-F lass, pulverized chalk,'apd sawdust. e ingredients are m thoroughly mingled by agitation and then form a viscid mass, which can easi 5 ily be brought into the desired shape. The vmass soon will become of stone-like hardness and appearance. The hardened mass is fireproof, waterproof to a certain degree, a very j bad conductor of heat, and, in spite of its 2o stone-like hardness, of relatively low specific gravity. The hardened molding can be sawed,

filed, bored, and polished. Nails can also be driven into it without cracking or otherwise "in j uring it.

. Although a liberal range of the proportions compound may be allowed, the following proportions have been found to give the best retwenty- I IS viseid mass any suitab V tengws.

orlng ma -ter or matters may be added accordsult: seventeen parts of eawdpst 3o seyenp ndfi y-slx parts oligaecoingto the color the finished product is to have. The mass is now brought into the desired shape and given a preliminary hardening and is tllen exposed to the free air for about forty-eight hours, when the molding'is ready to undergo the various finishing processes. The roughly-molded hardened article may be polished and lacgu'ered. A few of the arti-' es to be made out 0 this mass may here be enumerated: building-blocks for children to build miniature houses with, plinths, pillars, isolating-walls, floor and ceiling coverings, picture-frames, and fancy articles, such as inkstands, clock-cases, trays, and the like. The articles are almost indestructible.

What I do claim, and desire to secure by Letters Patent, is-

1. "The herein-described compound, con- 50 sistin g of sawdust, water-glass and pulverized chalk, mixed in about the proportions set forth.

2. The herein-described compound, consisting of sawdust, seventeen parts; pulverized chalk, twenty-seven parts; and water glass, fifty-six parts, substantially as and for; v the purposes'set forth. T"

In testimony whereof I afiix my signature in presence of two witnesses.

" RUDOLF PLATZ.

'Witnesses:

RUDOIAHVFRICKE, B. H. WARNER, Jr. 

